High-Quality Planar high-Tc Josephson Junctions

Reproducible high-Tc Josephson junctions have been made in a rather simple two-step process using ion irradiation. A microbridge (1 to 5 ?m wide) is firstly designed by ion irradiating a c-axis-oriented YBa2Cu3O7-? film through a gold mask such as the non-protected part becomes insulating. A lower T...

Full description

Saved in:
Bibliographic Details
Main Authors Bergeal, N, Grison, X, Lesueur, J, Faini, G, Aprili, M, Contour, J. P
Format Journal Article
LanguageEnglish
Published 30.06.2005
Subjects
Physics - Superconductivity
Online AccessGet full text

Cover

More Information
Summary:Reproducible high-Tc Josephson junctions have been made in a rather simple two-step process using ion irradiation. A microbridge (1 to 5 ?m wide) is firstly designed by ion irradiating a c-axis-oriented YBa2Cu3O7-? film through a gold mask such as the non-protected part becomes insulating. A lower Tc part is then defined within the bridge by irradiating with a much lower fluence through a narrow slit (20 nm) opened in a standard electronic photoresist. These planar junctions, whose settings can be finely tuned, exhibit reproducible and nearly ideal Josephson characteristics. This process can be used to produce complex Josephson circuits.
DOI:10.48550/arxiv.cond-mat/0506792